JavaScript Objects and Prototypes

Create Objects

Using function

Create Objects without duplication code: use functions

Using constructors

To indicate a function is a constructor:

append new keyword in front of the function name when executing it

Call

Property of function object
foo.call() = foo()
Call can bind different objects and can execute functions

__proto__

Copy of prototype object

If some property is not in the object itself, it then looks it in the prototype. If it finds it returns the value of that property
All the new object instances of function point to same prototype object
prototype.constructor: property that points to function

GitHub repo: https://github.com/kaosadi17/JavaScript/blob/master/objects%26prototypes.js

Comments

Sorting Algorithms

Bubble Sort Named as sinking sort. Compare each pair of the adjacent items and swap them if they are in the wrong order. Worst case and average case time complexity both O(n^2) and best case time complexity is O(n).

Java- Interview

Here are some popular tips in Java General Question JVM - Java Virtual Machine. Used to execute byte code. Platform dependent (but byte code is platform independent) JRE- Java Run time Environment. It provides run time environment and it's the implementation of JVM. It contains libraries and files that need to execute JVM. JDK- Java Development Kit. It contains JRE and development tools. Why java doesn't support pointers: It's insecure and complex to understand We can save java file with another name if class is not defined as public Java use camalCase notation for objects naming (ex: firstName) OOP Concepts Related Aggregation: weak relationship (bike has an indicator) Composition: strong relationship (bike has an engine) GUI Java GUI - Install Window builder to create GUI using Eclipse IDE Code Related No issues when you write static public void instead of public static void We can execute program without main method : using static bloc...

Hibernate

Hibernate is an ORM (Object Relational Mapping) tool which is primarily used in the data layer. Object Relational Mappings Problems There are several problems can occur when you are trying to save objects in the database from the scratch without using Hibernate. Mapping member variables to columns Mapping relationships Handling data types Managing changes to an object Set Up the Development Environment Following steps are briefly pointed out how to set up Hibernate on your local machine. Download the hibernate jar files Create a project in Eclipse Right click on the project name and go to properties Navigate to libraries tab Add library and import jar files (lib-> JPA/required) Add Postgres JDBC driver as jar file Configurations After you set up the Hibernate you have to create hiberante.cfg.xml file and do some configurations like setup database details, entity class, etc. Dialect: Define what kind of language should use to talk...

MyTech

Search This Blog